Reference: http://www.tcl.tk/doc/howto/compile.html#win
Bin can download pre-compiled version:
https://bitbucket.org/tombert/tcltk/downloads/
1. Download tcl-tk library
https://nchc.dl.sourceforge.net/project/tcl/Tcl/8.6.10/tcl8610-src.zip
https://nchc.dl.sourceforge.net/project/tcl/Tcl/8.6.10/tcl8610-src.zip
2.
Unzip the file downloaded to the following directory
E:\osg\tcl-tk\tcl8.6.10
versus
E:\osg\tcl-tk\tk8.6.10
And create the following directories:
E:\osg\tcl-tk\tcltk
3. Compile
Open the X64 Native Tools Command Prompt for VS 2019 program
3.1 TCL
cd E: \ osg \ tcl-tk \ tcl8.6.10 \ win
nmake -f makefile.vc INSTALLDIR=E:/osg/tcl-tk/tcltk
nmake -f makefile.vc install INSTALLDIR=E:/osg/tcl-tk/tcltk
3.2 TK
cd E:\osg\tcl-tk\tk8.6.10\win
nmake -f makefile.vc INSTALLDIR=E:/osg/tcl-tk/tcltk TCLDIR=E:/osg/tcl-tk/tcl8.6.10
nmake -f makefile.vc install INSTALLDIR=E:/osg/tcl-tk/tcltk TCLDIR=E:/osg/tcl-tk/tcl8.6.10